UCC2891DG4

DC DC Switching Controllers Overview

The UCC2891DG4 is a current-mode active clamp PWM controller from Texas Instruments, designed to simplify the implementation of active clamp/reset switching power topologies. The device integrates a high-voltage 700V power FET with a dedicated controller that processes operating information from the auxiliary flyback winding and the power FET. It operates within a supply voltage range of 12V to 14.5V, delivering an output voltage of 11.1V. Packaged in a 16-SOIC surface-mount case, it supports single-phase output control.

DC DC Switching Controllers Feature Summary

• Integrates a 700V power FET for simplified circuit design
• Features low output jitter for stable performance
• Includes soft-stop shutdown capability for MAIN and AUX lines

DC DC Switching Controllers Applications

• Active Clamp Forward Converters
• Active Clamp Reset Forward Converters
• Flyback Converters

DC DC Switching Controllers Procurement Notes

Verify the specific suffix (DG4) confirms the lead-free RoHS-compliant variant and 16-SOIC package. Confirm the manufacturer is Texas Instruments. Ensure the part status is listed as Active. Cross-reference the pinout with official documentation to avoid compatibility issues with similar models in the UCC289x family.

DC DC Switching Controllers Selection Notes

Select this component when designing isolated power supplies requiring integrated high-voltage switching. It is suitable for applications needing simplified active clamp/reset topology implementation. Consider the 16-SOIC package constraints and the 700V rating for voltage stress requirements. Evaluate the need for low jitter and soft-stop features in sensitive load environments.

DC DC Switching Controllers Part Context

This component belongs to the UCC289x family of current-mode active clamp PWM controllers. The family is engineered to reduce component count and design complexity for various active clamp/reset topologies. The DG4 suffix typically denotes a specific packaging and environmental compliance option within the broader UCC2891 product line.

DC DC Switching Controllers Replacement Considerations

Other members of the UCC289x family may serve as substitutes depending on specific pinout or feature requirements. Verify electrical compatibility and package dimensions before swapping.